If you want to manually swap these sounds for a "deeper" or custom effect:
Technically, Garry's Mod doesn't just have one select sound; it uses a suite of UI sounds inherited from . The most iconic "select" sounds include: gmod select sound effect
overhaul, the selection SFX is the unsung hero of the GMod experience. If you want to manually swap these sounds
If you are developing your own addon or map, you can trigger these sounds via Lua or Hammer: How To Make Sound Effects For Games gmod select sound effect
The sound is not unique to GMod; it is a legacy asset from Valve's Half-Life 2 .